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22#include "qemu/osdep.h"
23#include "qemu/error-report.h"
24#include "qapi/error.h"
25#include "hw/hw.h"
26#include "qemu/log.h"
27#include "sysemu/sysemu.h"
28#include "hw/boards.h"
29#include "hw/loader.h"
30#include "elf.h"
31#include "hw/sysbus.h"
32#include "sysemu/kvm.h"
33#include "sysemu/device_tree.h"
34#include "kvm_ppc.h"
35
36#include "hw/ppc/spapr.h"
37#include "hw/ppc/spapr_vio.h"
38#include "hw/ppc/xics.h"
39#include "hw/ppc/fdt.h"
40#include "trace.h"
41
42#include <libfdt.h>
43
44static Property spapr_vio_props[] = {
45 DEFINE_PROP_UINT32("irq", VIOsPAPRDevice, irq, 0), \
46 DEFINE_PROP_END_OF_LIST(),
47};
48
49static char *spapr_vio_get_dev_name(DeviceState *qdev)
50{
51 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
52 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
53
54
55 return g_strdup_printf("%s@%x", pc->dt_name, dev->reg);
56}
57
58static void spapr_vio_bus_class_init(ObjectClass *klass, void *data)
59{
60 BusClass *k = BUS_CLASS(klass);
61
62 k->get_dev_path = spapr_vio_get_dev_name;
63 k->get_fw_dev_path = spapr_vio_get_dev_name;
64}
65
66static const TypeInfo spapr_vio_bus_info = {
67 .name = TYPE_SPAPR_VIO_BUS,
68 .parent = TYPE_BUS,
69 .class_init = spapr_vio_bus_class_init,
70 .instance_size = sizeof(VIOsPAPRBus),
71};
72
73VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
74{
75 BusChild *kid;
76 VIOsPAPRDevice *dev = NULL;
77
78 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
79 dev = (VIOsPAPRDevice *)kid->child;
80 if (dev->reg == reg) {
81 return dev;
82 }
83 }
84
85 return NULL;
86}
87
88static int vio_make_devnode(VIOsPAPRDevice *dev,
89 void *fdt)
90{
91 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
92 int vdevice_off, node_off, ret;
93 char *dt_name;
94
95 vdevice_off = fdt_path_offset(fdt, "/vdevice");
96 if (vdevice_off < 0) {
97 return vdevice_off;
98 }
99
100 dt_name = spapr_vio_get_dev_name(DEVICE(dev));
101 node_off = fdt_add_subnode(fdt, vdevice_off, dt_name);
102 g_free(dt_name);
103 if (node_off < 0) {
104 return node_off;
105 }
106
107 ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
108 if (ret < 0) {
109 return ret;
110 }
111
112 if (pc->dt_type) {
113 ret = fdt_setprop_string(fdt, node_off, "device_type",
114 pc->dt_type);
115 if (ret < 0) {
116 return ret;
117 }
118 }
119
120 if (pc->dt_compatible) {
121 ret = fdt_setprop_string(fdt, node_off, "compatible",
122 pc->dt_compatible);
123 if (ret < 0) {
124 return ret;
125 }
126 }
127
128 if (dev->irq) {
129 uint32_t ints_prop[] = {cpu_to_be32(dev->irq), 0};
130
131 ret = fdt_setprop(fdt, node_off, "interrupts", ints_prop,
132 sizeof(ints_prop));
133 if (ret < 0) {
134 return ret;
135 }
136 }
137
138 ret = spapr_tcet_dma_dt(fdt, node_off, "ibm,my-dma-window", dev->tcet);
139 if (ret < 0) {
140 return ret;
141 }
142
143 if (pc->devnode) {
144 ret = (pc->devnode)(dev, fdt, node_off);
145 if (ret < 0) {
146 return ret;
147 }
148 }
149
150 return node_off;
151}
152
153
154
155
156static target_ulong h_reg_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
157 target_ulong opcode, target_ulong *args)
158{
159 target_ulong reg = args[0];
160 target_ulong queue_addr = args[1];
161 target_ulong queue_len = args[2];
162 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
163
164 if (!dev) {
165 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
166 return H_PARAMETER;
167 }
168
169
170 if (queue_len < 0x1000 || queue_len > 0x10000000) {
171 hcall_dprintf("Queue size too small or too big (0x" TARGET_FMT_lx
172 ")\n", queue_len);
173 return H_PARAMETER;
174 }
175
176
177 if (queue_addr & 0xfff) {
178 hcall_dprintf("Queue not aligned (0x" TARGET_FMT_lx ")\n", queue_addr);
179 return H_PARAMETER;
180 }
181
182
183 if (!dev->crq.SendFunc) {
184 hcall_dprintf("Device does not support CRQ\n");
185 return H_NOT_FOUND;
186 }
187
188
189 if (dev->crq.qsize) {
190 hcall_dprintf("CRQ already registered\n");
191 return H_RESOURCE;
192 }
193 dev->crq.qladdr = queue_addr;
194 dev->crq.qsize = queue_len;
195 dev->crq.qnext = 0;
196
197 trace_spapr_vio_h_reg_crq(reg, queue_addr, queue_len);
198 return H_SUCCESS;
199}
200
201static target_ulong free_crq(VIOsPAPRDevice *dev)
202{
203 dev->crq.qladdr = 0;
204 dev->crq.qsize = 0;
205 dev->crq.qnext = 0;
206
207 trace_spapr_vio_free_crq(dev->reg);
208
209 return H_SUCCESS;
210}
211
212static target_ulong h_free_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
213 target_ulong opcode, target_ulong *args)
214{
215 target_ulong reg = args[0];
216 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
217
218 if (!dev) {
219 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
220 return H_PARAMETER;
221 }
222
223 return free_crq(dev);
224}
225
226static target_ulong h_send_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
227 target_ulong opcode, target_ulong *args)
228{
229 target_ulong reg = args[0];
230 target_ulong msg_hi = args[1];
231 target_ulong msg_lo = args[2];
232 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
233 uint64_t crq_mangle[2];
234
235 if (!dev) {
236 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
237 return H_PARAMETER;
238 }
239 crq_mangle[0] = cpu_to_be64(msg_hi);
240 crq_mangle[1] = cpu_to_be64(msg_lo);
241
242 if (dev->crq.SendFunc) {
243 return dev->crq.SendFunc(dev, (uint8_t *)crq_mangle);
244 }
245
246 return H_HARDWARE;
247}
248
249static target_ulong h_enable_crq(PowerPCCPU *cpu, sPAPRMachineState *spapr,
250 target_ulong opcode, target_ulong *args)
251{
252 target_ulong reg = args[0];
253 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
254
255 if (!dev) {
256 hcall_dprintf("Unit 0x" TARGET_FMT_lx " does not exist\n", reg);
257 return H_PARAMETER;
258 }
259
260 return 0;
261}
262
263
264int spapr_vio_send_crq(VIOsPAPRDevice *dev, uint8_t *crq)
265{
266 int rc;
267 uint8_t byte;
268
269 if (!dev->crq.qsize) {
270 error_report("spapr_vio_send_creq on uninitialized queue");
271 return -1;
272 }
273
274
275 rc = spapr_vio_dma_read(dev, dev->crq.qladdr + dev->crq.qnext, &byte, 1);
276 if (rc) {
277 return rc;
278 }
279 if (byte != 0) {
280 return 1;
281 }
282
283 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext + 8,
284 &crq[8], 8);
285 if (rc) {
286 return rc;
287 }
288
289 kvmppc_eieio();
290
291 rc = spapr_vio_dma_write(dev, dev->crq.qladdr + dev->crq.qnext, crq, 8);
292 if (rc) {
293 return rc;
294 }
295
296 dev->crq.qnext = (dev->crq.qnext + 16) % dev->crq.qsize;
297
298 if (dev->signal_state & 1) {
299 qemu_irq_pulse(spapr_vio_qirq(dev));
300 }
301
302 return 0;
303}
304
305
306
307static void spapr_vio_quiesce_one(VIOsPAPRDevice *dev)
308{
309 if (dev->tcet) {
310 device_reset(DEVICE(dev->tcet));
311 }
312 free_crq(dev);
313}
314
315void spapr_vio_set_bypass(VIOsPAPRDevice *dev, bool bypass)
316{
317 if (!dev->tcet) {
318 return;
319 }
320
321 memory_region_set_enabled(&dev->mrbypass, bypass);
322 memory_region_set_enabled(spapr_tce_get_iommu(dev->tcet), !bypass);
323
324 dev->tcet->bypass = bypass;
325}
326
327static void rtas_set_tce_bypass(PowerPCCPU *cpu, sPAPRMachineState *spapr,
328 uint32_t token,
329 uint32_t nargs, target_ulong args,
330 uint32_t nret, target_ulong rets)
331{
332 VIOsPAPRBus *bus = spapr->vio_bus;
333 VIOsPAPRDevice *dev;
334 uint32_t unit, enable;
335
336 if (nargs != 2) {
337 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
338 return;
339 }
340 unit = rtas_ld(args, 0);
341 enable = rtas_ld(args, 1);
342 dev = spapr_vio_find_by_reg(bus, unit);
343 if (!dev) {
344 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
345 return;
346 }
347
348 if (!dev->tcet) {
349 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
350 return;
351 }
352
353 spapr_vio_set_bypass(dev, !!enable);
354
355 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
356}
357
358static void rtas_quiesce(PowerPCCPU *cpu, sPAPRMachineState *spapr,
359 uint32_t token,
360 uint32_t nargs, target_ulong args,
361 uint32_t nret, target_ulong rets)
362{
363 VIOsPAPRBus *bus = spapr->vio_bus;
364 BusChild *kid;
365 VIOsPAPRDevice *dev = NULL;
366
367 if (nargs != 0) {
368 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
369 return;
370 }
371
372 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
373 dev = (VIOsPAPRDevice *)kid->child;
374 spapr_vio_quiesce_one(dev);
375 }
376
377 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
378}
379
380static VIOsPAPRDevice *reg_conflict(VIOsPAPRDevice *dev)
381{
382 VIOsPAPRBus *bus = SPAPR_VIO_BUS(dev->qdev.parent_bus);
383 BusChild *kid;
384 VIOsPAPRDevice *other;
385
386
387
388
389
390
391 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
392 other = VIO_SPAPR_DEVICE(kid->child);
393
394 if (other != dev && other->reg == dev->reg) {
395 return other;
396 }
397 }
398
399 return 0;
400}
401
402static void spapr_vio_busdev_reset(DeviceState *qdev)
403{
404 VIOsPAPRDevice *dev = VIO_SPAPR_DEVICE(qdev);
405 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
406
407
408 spapr_vio_quiesce_one(dev);
409
410 dev->signal_state = 0;
411
412 spapr_vio_set_bypass(dev, false);
413 if (pc->reset) {
414 pc->reset(dev);
415 }
416}
417
418static void spapr_vio_busdev_realize(DeviceState *qdev, Error **errp)
419{
420 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
421 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
422 VIOsPAPRDeviceClass *pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
423 char *id;
424 Error *local_err = NULL;
425
426 if (dev->reg != -1) {
427
428
429
430
431
432
433 VIOsPAPRDevice *other = reg_conflict(dev);
434
435 if (other) {
436 error_setg(errp, "%s and %s devices conflict at address %#x",
437 object_get_typename(OBJECT(qdev)),
438 object_get_typename(OBJECT(&other->qdev)),
439 dev->reg);
440 return;
441 }
442 } else {
443
444 VIOsPAPRBus *bus = SPAPR_VIO_BUS(dev->qdev.parent_bus);
445
446 do {
447 dev->reg = bus->next_reg++;
448 } while (reg_conflict(dev));
449 }
450
451
452 if (!dev->qdev.id) {
453 id = spapr_vio_get_dev_name(DEVICE(dev));
454 dev->qdev.id = id;
455 }
456
457 dev->irq = xics_spapr_alloc(spapr->xics, dev->irq, false, &local_err);
458 if (local_err) {
459 error_propagate(errp, local_err);
460 return;
461 }
462
463 if (pc->rtce_window_size) {
464 uint32_t liobn = SPAPR_VIO_LIOBN(dev->reg);
465
466 memory_region_init(&dev->mrroot, OBJECT(dev), "iommu-spapr-root",
467 ram_size);
468 memory_region_init_alias(&dev->mrbypass, OBJECT(dev),
469 "iommu-spapr-bypass", get_system_memory(),
470 0, ram_size);
471 memory_region_add_subregion_overlap(&dev->mrroot, 0, &dev->mrbypass, 1);
472 address_space_init(&dev->as, &dev->mrroot, qdev->id);
473
474 dev->tcet = spapr_tce_new_table(qdev, liobn);
475 spapr_tce_table_enable(dev->tcet, SPAPR_TCE_PAGE_SHIFT, 0,
476 pc->rtce_window_size >> SPAPR_TCE_PAGE_SHIFT);
477 dev->tcet->vdev = dev;
478 memory_region_add_subregion_overlap(&dev->mrroot, 0,
479 spapr_tce_get_iommu(dev->tcet), 2);
480 }
481
482 pc->realize(dev, errp);
483}
484
485static target_ulong h_vio_signal(PowerPCCPU *cpu, sPAPRMachineState *spapr,
486 target_ulong opcode,
487 target_ulong *args)
488{
489 target_ulong reg = args[0];
490 target_ulong mode = args[1];
491 VIOsPAPRDevice *dev = spapr_vio_find_by_reg(spapr->vio_bus, reg);
492 VIOsPAPRDeviceClass *pc;
493
494 if (!dev) {
495 return H_PARAMETER;
496 }
497
498 pc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
499
500 if (mode & ~pc->signal_mask) {
501 return H_PARAMETER;
502 }
503
504 dev->signal_state = mode;
505
506 return H_SUCCESS;
507}
508
509VIOsPAPRBus *spapr_vio_bus_init(void)
510{
511 VIOsPAPRBus *bus;
512 BusState *qbus;
513 DeviceState *dev;
514
515
516 dev = qdev_create(NULL, TYPE_SPAPR_VIO_BRIDGE);
517 qdev_init_nofail(dev);
518
519
520 qbus = qbus_create(TYPE_SPAPR_VIO_BUS, dev, "spapr-vio");
521 bus = SPAPR_VIO_BUS(qbus);
522 bus->next_reg = 0x71000000;
523
524
525 spapr_register_hypercall(H_VIO_SIGNAL, h_vio_signal);
526
527
528 spapr_register_hypercall(H_REG_CRQ, h_reg_crq);
529 spapr_register_hypercall(H_FREE_CRQ, h_free_crq);
530 spapr_register_hypercall(H_SEND_CRQ, h_send_crq);
531 spapr_register_hypercall(H_ENABLE_CRQ, h_enable_crq);
532
533
534 spapr_rtas_register(RTAS_IBM_SET_TCE_BYPASS, "ibm,set-tce-bypass",
535 rtas_set_tce_bypass);
536 spapr_rtas_register(RTAS_QUIESCE, "quiesce", rtas_quiesce);
537
538 return bus;
539}
540
541
542
543static int spapr_vio_bridge_init(SysBusDevice *dev)
544{
545
546 return 0;
547}
548
549static void spapr_vio_bridge_class_init(ObjectClass *klass, void *data)
550{
551 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
552 DeviceClass *dc = DEVICE_CLASS(klass);
553
554 dc->fw_name = "vdevice";
555 k->init = spapr_vio_bridge_init;
556}
557
558static const TypeInfo spapr_vio_bridge_info = {
559 .name = TYPE_SPAPR_VIO_BRIDGE,
560 .parent = TYPE_SYS_BUS_DEVICE,
561 .class_init = spapr_vio_bridge_class_init,
562};
563
564const VMStateDescription vmstate_spapr_vio = {
565 .name = "spapr_vio",
566 .version_id = 1,
567 .minimum_version_id = 1,
568 .fields = (VMStateField[]) {
569
570 VMSTATE_UINT32_EQUAL(reg, VIOsPAPRDevice),
571 VMSTATE_UINT32_EQUAL(irq, VIOsPAPRDevice),
572
573
574 VMSTATE_UINT64(signal_state, VIOsPAPRDevice),
575 VMSTATE_UINT64(crq.qladdr, VIOsPAPRDevice),
576 VMSTATE_UINT32(crq.qsize, VIOsPAPRDevice),
577 VMSTATE_UINT32(crq.qnext, VIOsPAPRDevice),
578
579 VMSTATE_END_OF_LIST()
580 },
581};
582
583static void vio_spapr_device_class_init(ObjectClass *klass, void *data)
584{
585 DeviceClass *k = DEVICE_CLASS(klass);
586 k->realize = spapr_vio_busdev_realize;
587 k->reset = spapr_vio_busdev_reset;
588 k->bus_type = TYPE_SPAPR_VIO_BUS;
589 k->props = spapr_vio_props;
590}
591
592static const TypeInfo spapr_vio_type_info = {
593 .name = TYPE_VIO_SPAPR_DEVICE,
594 .parent = TYPE_DEVICE,
595 .instance_size = sizeof(VIOsPAPRDevice),
596 .abstract = true,
597 .class_size = sizeof(VIOsPAPRDeviceClass),
598 .class_init = vio_spapr_device_class_init,
599};
600
601static void spapr_vio_register_types(void)
602{
603 type_register_static(&spapr_vio_bus_info);
604 type_register_static(&spapr_vio_bridge_info);
605 type_register_static(&spapr_vio_type_info);
606}
607
608type_init(spapr_vio_register_types)
609
610static int compare_reg(const void *p1, const void *p2)
611{
612 VIOsPAPRDevice const *dev1, *dev2;
613
614 dev1 = (VIOsPAPRDevice *)*(DeviceState **)p1;
615 dev2 = (VIOsPAPRDevice *)*(DeviceState **)p2;
616
617 if (dev1->reg < dev2->reg) {
618 return -1;
619 }
620 if (dev1->reg == dev2->reg) {
621 return 0;
622 }
623
624
625 return 1;
626}
627
628void spapr_dt_vdevice(VIOsPAPRBus *bus, void *fdt)
629{
630 DeviceState *qdev, **qdevs;
631 BusChild *kid;
632 int i, num, ret = 0;
633 int node;
634
635 _FDT(node = fdt_add_subnode(fdt, 0, "vdevice"));
636
637 _FDT(fdt_setprop_string(fdt, node, "device_type", "vdevice"));
638 _FDT(fdt_setprop_string(fdt, node, "compatible", "IBM,vdevice"));
639 _FDT(fdt_setprop_cell(fdt, node, "#address-cells", 1));
640 _FDT(fdt_setprop_cell(fdt, node, "#size-cells", 0));
641 _FDT(fdt_setprop_cell(fdt, node, "#interrupt-cells", 2));
642 _FDT(fdt_setprop(fdt, node, "interrupt-controller", NULL, 0));
643
644
645 num = 0;
646 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
647 num++;
648 }
649
650
651 qdevs = g_malloc(sizeof(qdev) * num);
652 num = 0;
653 QTAILQ_FOREACH(kid, &bus->bus.children, sibling) {
654 qdevs[num++] = kid->child;
655 }
656
657
658 qsort(qdevs, num, sizeof(qdev), compare_reg);
659
660
661
662 for (i = num - 1; i >= 0; i--) {
663 VIOsPAPRDevice *dev = (VIOsPAPRDevice *)(qdevs[i]);
664 VIOsPAPRDeviceClass *vdc = VIO_SPAPR_DEVICE_GET_CLASS(dev);
665
666 ret = vio_make_devnode(dev, fdt);
667 if (ret < 0) {
668 error_report("Couldn't create device node /vdevice/%s@%"PRIx32,
669 vdc->dt_name, dev->reg);
670 exit(1);
671 }
672 }
673
674 g_free(qdevs);
675}
676
677gchar *spapr_vio_stdout_path(VIOsPAPRBus *bus)
678{
679 VIOsPAPRDevice *dev;
680 char *name, *path;
681
682 dev = spapr_vty_get_default(bus);
683 if (!dev) {
684 return NULL;
685 }
686
687 name = spapr_vio_get_dev_name(DEVICE(dev));
688 path = g_strdup_printf("/vdevice/%s", name);
689
690 g_free(name);
691 return path;
692}
693